We go together like
Digestives dipped in tea.
Your girlfriend and a hike.
A sting and a bee.

I love you like
Dogs love chasing postmen.
Halfords love a bike.
Teachers love red pen.

I need you like
Meerkats need you to go to a different website.
Aunt Josephine needed Ike.
Ghosts need to fright.

In summary, then,
We go together like
I love you like
I need you like

Really poor metaphors.
A reference to popular culture.
An ironic rhyme scheme and rhythm that vanishes towards the end.
Don’t you love a flirt, darling?